autosleek

hi there! has anybody tried the cool harness. its summer and my car cant stand the heat. goes up to 100c and a little bit over in stop and go traffic. but it goes down to 85 once you start going.

LoveLEE143

Does your aux fan come on at all.

autosleek

it does but when the temp reach l little bit over 100c...and it freaks me out specially at traffic.

RBYCC

I just installed the CH-92 on my twin turbo M103.
It lowers the point that the aux fan comes on from 105 to 92 degree C.
Even in recent 90 degree temp and high humidity, I run around 85-87 degree C so the aux fan rarely comes on.
I bought it more as "insurance" to keep the engine cool in an unusual event

You might want to check out your cooling system, clean and flush it, new lower temp thermostat, fresh antifreeze and maybe some water wetter

shadowgriffen

funny my car just started doing the same thing (I mean, I KNOW these cars run hot) but it never used to hit the 100 mark, and now it does.

time for a new thermostat?

EDIT: I can tell that my aux fans dont come on anymore, I used to hear them and I dont anymore...

rooney2006

whats the ch-92?

RBYCC

It's a device that includes the resistor to lower the aux fan on temp to 92 degree c. You remove the harness from the temp sender, plug the Ch-92 into the temp sender, then plug your stock harness into the CH-92. This version is for the earlier cars.

rooney2006

how much are those and where can one purchase them?

ksing44

I just had a new fuse put in for my aux fan and now it seems to keep the car cooler with just the low speed fan that comes on due to pressure in the AC system.

I do have a cool harness, but didn't install it yet.

RBYCC

http://pages.prodigy.net/jforgione/MB_S500.html

To any W124/C124 owner who runs above 100+ degree c in hot weather, you probably need more then a device to lower the aux fan start temp.

I've owned my 300CE since purchased new in May of 1988.
Cooling system always maintained and antifreeze changed every two years.
System was flushed a few times over nineteen years.
It has never, even under extreme conditions run above 90-95 degree C, and that is a rare occurence.

Suggest with the engine cool you look for any rust or brown discoloration in your coolant.

Best to go to a radiator shop and have them power flush your system, including heater core, until water runs clear.
Install a new thermostat, pressure cap and if required new hoses.
Fill with a good quality antifreeze and water mix and add some "water wetter"
This is an inexpensive investment that will keep your engine running cooler and allow more durability.

Heat kills engines and transmissions....


The professional flush and clean and refill will solve most overheating problems in older high mileage vehicles